Cool things that you can do with Mentawai

Deal with HTTP parameters

contact.jsp

<form action="ContactAction.mtw" method="post">
    Name: <input type="text" name="name" /> <br />
    Birthdate: <input type="text" name="birthdate" /> <br />
    Age: <input type="text" name="age" /> <br />
</form>

ContactAction.java

public class ContactAction extends BaseAction {

    public String execute() {
        String name = input.getString("name");
        Date birthdate = input.getDate("birthdate");
        int age = input.getInt("age");
        return SUCCESS;
    }

}

Simple access to JPA EntityManager

public class ContactAction extends BaseAction {
    
    public String searchContacts() {

        EntityManager entityManager = (EntityManager) input.getValue(JpaFilter.KEY);
        ...

    }

}

public class ConfigManager extends ApplicationManager {
        
    @Override
    public void loadFilters() {
        filter(new JpaFilter("persistenceUnitNameHere"));
    }

}

Integration with Apache Commons FileUpload

<form action="ContactAction.mtw" method="post" enctype="multipart/form-data">
    <input type="file" name="photo" />
    <input type="submit" value="Send..." />
</form>

public class ConfigManager extends ApplicationManager {
        
    @Override
    public void loadActions() {
        action("/ContactAction", ContactAction.class).fwdOk("/contact.jsp")
        .filter(new FileUploadFilter());
    }

}

public class ContactAction extends BaseAction {
    
    public String execute() {

        FileItem photo = (FileItem) input.getValue("photo");
        ...

    }

}

Fill objects automatically

public class Contact {

    private String name;
    private String phoneNumber;

    public Contact() {
    
    }

    // Getters and Setters...
}

<form action="ContactAction.mtw" method="post">
    Name: <input type="text" name="name" /> <br />
    Phone number: <input type="text" name="phoneNumber" /> <br />
</form>

The VOFilter below do the real thing...

public class ConfigManager extends ApplicationManager {
        
    @Override
    public void loadActions() {
        action("/ContactAction", ContactAction.class).fwdOk("/contact.jsp")
        .filter(new VOFilter("contact", Contact.class));
    }

}

public class ContactAction extends BaseAction {
    
    public String execute() {
        Contact contact = (Contact) input.getValue("contact");
        ...
    }

}